I got a call from this number on sep 23 2013 . Unknown

Got a call at four in the morning.  I am not a happy camper since I was sleeping well for a change.  This is a landline. I don't know who it is since when I called back, it is constantly busy.  

Got 3 calls in a row Sunday evening at 7 pm could not answer, when I returned call it rang busy. They then proceeded to dial my husband's number twice... 5  calls in 3 minutes!!

It is the Galveston County Jail